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이미지프로세싱기법을 이용한 포장이미지의 특성과 노이즈제거를 위한 알고리즘 선정
김정용,조윤호,Kim, Jung-Yong,Cho, Yoon-Ho 한국도로학회 2001 한국도로포장공학회 논문집 Vol.3 No.4
포장유지관리시스템에 있어서 포장표면 정보는 가장 중요한 인자 중의 하나이다. 따라서 일찍부터 선진국들은 자국의 현실에 알맞은 포장표면 조사장비와 프로그램을 개발하여 사용하고 있다. 국내의 경우 고가의 외국장비와 프로그램을 수입하여 사용하고 있으나 많은 문제점으로 인해 국산 장비와 포장표면 분석 프로그램 개발의 필요성이 대두되고 있다. 본 연구는 아스팔트 포장표면 분석 프로그램 개발을 위한 선행연구이다. 본 연구의 초점은 이미지프로세싱 기술을 이용한 포장표면 분석 원리를 규명하고 포장이미지의 특성 및 포장이미지의 노이즈를 효과적으로 제거하기 위한 알고리즘을 실험하는 것이다. ARAN(Automatic Road Analyser)의 균열맵을 분석 샘플로 이용하였으며, 포장이미지의 통계적인 특성, 히스토그램, FFT(Fast Fourier Transform)영상을 분석하여 일반적인 이미지에 비해 노이즈와 고주파 성분이 많고, 배경과 균열 분리가 어려운 특성을 규명하였다. 또한 노이즈 제거를 위해 다양한 필터를 적용하여 실험한 결과 마스크 크기가 3X3인 중간값 필터가 가장 효과가 좋은 것으로 나타났다. Pavement distresses are one of the most important data for pavement management systems. Inspection machines and its related programs have been used for operating tools in PMS developed in advanced countries. In Korea imported machines and programs for the length price ale utilized to get information of pavement condition from the field This study is launched for developing the program which can detect cracks on asphalt pavement due to many drawbacks in current PMS operation such as improper maintenance work and long resting period when it was broken. The focus of this study is to define principles to analyze pavement surface with digital image processing techniques, to test property of pavement images and to suggest an algorithm that reduces noises at test. To test images, the camera attached on the Automatic Road Analyser(ARAN) was used. Through the FFT images, histogram and statistical values of pavement images, it was found that the images had many noises with high-frequency components against general images, and it was difficult to subdivide pavement images into background or crack. Through several testing with various filters for noise reduction a 3X3 median filter was suggested to reduce noises effectively.
에너지소비량 및 이산화탄소 배출량 분석을 통한 건축 바닥 컴포넌트의 친환경 성능 평가에 관한 연구
김정용(Kim Jung-Yong),김영석(Kim Young-Suk),김재준(Kim Jae-Jun) 대한건축학회 2008 대한건축학회논문집 Vol.24 No.11
The global warming has been raised as the most serious problem all over the world at the present and many countries have been working out to reduce carbon dioxide emission which is the main factor to occur the global warming. The carbon dioxide is generated in all industries and particularly, construction industry occupy 42% of all industry wastes. Therefore, it is sorted as the environment obstruction industry. So, the development of environmentally sustainable construction materials is required to reduce carbon dioxide on the stage of producing construction materials. In this study, the energy consumption and carbon dioxide emission in the object floor components are analyzed and compared to each other with SUSB-LCA ver 1.0. As the result, it is analyzed that dry double floor has the best performance and has the worst performance in terms of environmentally sustainable performance.
지반조건과 건물균열 효과에 따른 APR1400 원자로냉각재계통 지진응답 평가
김정용(Jung Yong Kim),전장환(Jang Hwan Jheon),성기광(Ki Kwang Sung),김현민(Hyun Min Kim) 대한기계학회 2016 대한기계학회 춘추학술대회 Vol.2016 No.12
Seismic analysis for the APR1400 Reactor Coolant System is performed considering various soil profiles and effects of concrete cracking. In this paper, the seismic responses of the APR1400 RCS is evaluated. The maximum RCS support and nozzle loads occur in the fixed base condition. As a soil profile goes to hard rock condition, the maximum seismic loads response tends to increase. Peak value of acceleration response spectra also occur in the fixed base condition. However, peaks are found in other cases in low frequency region. From this study, It is concluded that the seismic response from the fixed base condition governs the RCS seismic design.